lib/google/cloud/spanner/database/list.rb in google-cloud-spanner-1.6.0 vs lib/google/cloud/spanner/database/list.rb in google-cloud-spanner-1.6.1

@@ -148,10 +148,10 @@
             databases = List.new(Array(grpc.databases).map do |database|
               Database.from_grpc database, service
             end)
             databases.instance_variable_set :@instance_id, instance_id
             token = grpc.next_page_token
-            token = nil if token == ""
+            token = nil if token == "".freeze
             databases.instance_variable_set :@token,   token
             databases.instance_variable_set :@service, service
             databases.instance_variable_set :@max,     max
             databases
           end